Grease-trap.



No. 684,623. Patented Oct. l5, I90l.

- J. TUCKER.

GREASE TRAP.

(Application filed June 30, IQQO.)

2 Sheets-She I.

(No Model.)

\MTNEESES.

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Patented Oct. I5, l90l.

J. TUCKER. GREASE TRAP.

(Application filed. June 80, 1900.)

2 Sheets-Sheet 2.

(No Model.)

\MTNESEEE- INVENTICIR- fm HIS ATTORNEY ATENT UNITE STATES JOHN TUCKER,OF NEW YORK, N. Y.

GREASE TRAP.

SPECIFICATION forming part of Letters Patent N 0. 684,623, dated October15, 1901 Application filed June 30, 1900. Serial No. 22,169, (No model.)

To ctZZ whom it may concern.-

Be it known that I, JOHN TUCKER, a citizen of the United States, and aresident of the borough of Manhattan, city of New York, in the county ofNew York and State of New York, have invented certain new and usefulImprovements in Grease-Traps, of which the following is a specification.

My invention relates to traps which are applied to sinks or to thewaste-pipes of sinks or the like and into which greasy water or liquidgrease may be emptied for the purpose of arresting, congealing, andaccumulating the grease, and thus preventing it from gathering upon theinterior surface of the waste-pipe and clogging the latter, all as fullyset forth in Letters Patent granted to me September 25, 1883, No.285,770, and October 16, 1883, No. 286,975. In such traps it is usual toadmit the waste water to the lower portion of a receiver and to causethe water to pass upwardly and then downwardly and out of the receiver,the greasy particles being thus given an opportunity to rise and gatherupon the surface of the water, and the receiver is usually surrounded bya coldwater jacket, whereby the greasy particles are congealed and forma gradually-thickening crust or layer at the top of the receptacle.

The object of the present invention is to simplify the apparatus andalso to increase the effectiveness of the trap in congealing andretaining the grease.

The invention consists in certain features of construction, arrangementsof parts, and combinations of devices, all as will be fully hereinafterset forth, and particularly pointed out in the concluding claims.

In the accompanying drawings, Figure 1 is a central sectional elevationof a grease-trap constructed in accordance with my invention, and Fig. 2is a sectional plan taken at the line X X of Fig. 1.

In the views similar parts are designated by similar numerals ofreference.

1 indicates as an entirety a cylindrical receptacle resting upon legs 2and composed of two concentric shells 3 and 4 of such diameters as toprovide an intermediate space 5. The outer shell 3 has a top 3 andbottom 3", and the inner and shorter shell 4 has a top 4; and bottom 4,and between said tops there isa space 5 and between said bottoms a space5. The spaces 5 5 5 communicate with one another and are filled withcold water from a supply-pipe 6, connected to the lower end of thereceptacle, which at its upper end is provided with an outlet-pipe 7, sothat a circulation of cold water, through the spaces or jacket may beobtained.

The lower part of the inner shell or receptacle is divided into twopockets by a transverse vertical hollow partition 8, the cavity or space9 between the walls of the partition communicating with the space 5between the outer and inner shells of the receptacle, so

that the cold water may freely circulate within said partition.

The sink is connected to the receptacle by a vertical pipe 10, whichenters the lower portion of the inner shell 4 horizontally at a point 11opposite to or facing the partition 8. An outlet or discharge pipe 12 isconnected to the shell 4 at the lower portion of the right-hand pocketat Fig. 1 upon the opposite side of the partition from the ingress 11and extends upwardly at 13 to a point a little lower than the top of thereceptacle, and thence downwardly and to a connection with the mainwaste or sewer pipe.

The top of the receptacle is provided with a circular opening 14,through which the accumulations of grease may be removed, and saidopening is provided with a seat for alid 15, which may be locked bywing-nuts 16.

Normally the inner shell of the receptacle is nearly filled with wastewater, the level of the latter being determined by the height of theupper bend in the discharge-pipe 13. The

partition 8 obstructs or breaks the flow of the greasy water from theinlet 11 toward the discharge 12 and deflects it upwardly, the greaseremaining at the top by reason of its buoyancy, while the Water descendsand is discharged at the other side of the partition. The grease iscongealed by the cool Walls of the receptacle and forms a floating crustor layer. Additions are constantly made to the bottom of this layer,which gradually extend downwardly and if permitted to accumulate willeventually constrict the waterpassage over the top of the partition,retard the flow, and then close the passage altogether, thus causing thewater to back up into the sink, whereby the servant or attendant isnotified that the receptacle needs cleaning.

The hollow partition 8 prevents the greasy water from driving straightacross the trap and into the outlet 12, and by reason of its beingcooled by the watercirculating therein is extremely useful in congealingthe grease, since the area of the cooling-surfaces is materiallyincreased by the provision of said hollow partition. The enteringmixture of grease and water is directed toward or against the Verticalface of the partition and is quickly chilled thereby, thus not onlypreventing the partial dissolution of the floating grease cake by theinflow of heated water, but also effectually aiding to congeal thegrease contained in the water, so that it may pack upon the undersurface of the previously-formed cake. Moreover, as the accumulation ofgrease continues it encroaches upon the inner surface of the shell 4, sothat the effective cooling area of the latter is gradually diminished,but the partition 8 continues to be effective to congeal the grease aslong as the waste water can pass into the trap, and it is of especialadvantage when the pack of grease extends down nearly to the top of thepartition, where the grease would be more ex-. posed to the meltingaction of the incoming hot water and would be liable to be constantlywashed away thereby if the water were not cooled by contact with thehollow partition before striking the cake.

Various changes in details of construction and arrangement may be madewithin the scope of the invention, the gist of which resides in thearrangement of a cold-water obstruction=chamber or hollow partitionwithin the body of the receptacle. 7

What I claim as new, and desire to secure by Letters Patent, is

1. A grease-trap comprising, in combination, a grease-receptacle havingan inlet and a discharge, and a cold-water chamber arranged within thebody of said grease-receptacle opposite said inlet and extending abovethe same.

2. A grease-trap comprising, in combina: tion, a receptacle having aninlet and a discharge, and also provided with an externalwater-jacket,and an internal cold-water chamber communicating with saidwater-jacket.

3. A grease-trap comprising, in combination, a receptacle having aninlet and a discharge, a hollow obstructing-wall arranged within saidreceptacle, and means for filling said wall with cold water.

4. A grease-trap comprising, in combination, a receptacle having aninlet, a discharge and a water-jacket, and a hollow obstruction arrangedwithin said receptacle and communicating with said water-jacket.

5. A grease trap comprising, in combination, a receptacle having aninlet and a discharge, a hollow partition fixed in the lower portion ofsaid receptacle, and means for filling said partition with water.

6. A grease-trap comprising, in combination, a receptacle having aninlet and a discharge, a hollow partition fixed in the lower portion ofsaid receptacle between said inlet and discharge, and means for fillingsaid partition with water.

7. A grease-trap comprising, in combination, a receptacle having aninlet, a vertical hollow cold-water partition arranged in saidreceptacle opposite said inlet, and an outlet arranged at the other sideof said partition.

8. A grease-trap comprising, in combination, a receptacle provided withan internallyarranged hollow cooling device, an inlet constructed andarranged to direct the inflow of greasy water against said coolingdevice, and an outlet arranged at the lower portion of the receptacle.

9. A grease-trap comprising, in combination, a receptacle provided witha waterjacket, a hollow partition having a water communication with saidwater-jacket and dividing the lower portion of said receptacle into twopockets, an inlet arranged at the lower portion of one of said pockets,and an outlet arranged at the lower portion of the other of saidpockets.

10. A grease-trap comprising, in combination, an inner shell and anouter shell, an inlet and a discharge, an upright cold-water chamberarranged within the body of the inner shell and dividing its lowerportion into two pockets, and means for supplying the space between thetwo shells with cold water and for also supplying the said uprightinternal water-chamber with cold water.

Signed at the borough of Manhattan, in the city of New York, in thecounty of New York and State of New York, this 28th day of June,

JOHN TUCKER. YVitnesses:

WM. B. BROWN, WILLIAM T. INNEs.

